MC-1-M .061-.250" by .001" Minus Tolerance Pin Gage Set - 190 Gages

A massive, high-quality set at a good price. Arrived in pristine shape (no rust or bent gages), in a sturdy box, everything finely ground, polished, and made to tight tolerances. I was a bit hesitant at first, but have no regrets going with this brand.

Used to check and set jetting sizes on carburetor jets. Only needed the smaller size gauges but at the price it was cheaper to get the full set

Never buy any carburetor without thinking about doing your own QC. At a minimum, you need to know your baseline numbers before attempting any tuning. I had a cheaper pin set before which had many pins off by .0015", making the set only marginally useful as nearly 10% of the sizes listed weren't actually in the box. Spot checking these with a mic found everything spot on: pins undersized by .0005" [+/- .0001], which allows insertion without an interference fit. Found and fixed an idle air bleed mismatch of .002", along with a severely mismatched idle circuit sizing caused by poor drilling practices that had choked off passage almost 50% - guaranteed to cause a bad lean out at idle. Pins all wrapped with preservative, and should arrive spotless. Glad I bought it.

This pin guage arrived with all the oil and plastic coverings on each item so I had some cleaning to do. Once that was done, they measured acurately and did the job..

Larger pin gauges to complete my set. So far they appear accurate for carb jetting. Priced right.

Updated ReviewWell, the pins are good from a diameter perspective but many of the pins are slightly bent. This makes them impossible to use to check run-out (TIR) in chucks. They are off by only a few thousandths but it makes a difference. Also, if you are measuring deep holes, the bend will cause the hole to appear smaller than it is.Wish I had spent the money for a brand name set.Original ReviewI did a 10% check on the gage pins (measured 10% of them randomly) and found them to be very accurate and true along the length of the entire pin. I am very impressed for the money. I will be purchasing the next biggest set soon.Also, the case is very nice with all of the numbers being readily readable and the lid closes tight. Thank you for the great gage pin set.

The box is far bigger than the one in the picture and broke in transit. Due to this it was returned but the current box is so big it would take up a ton of room in your toolbox. I would look elsewhere.

I need to make fine measurements all the time in my shop. I purchased these and they are accurately made and the box is sturdy enough, but not what I would like to see.